NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Classification of the methods for clearing the Lunar Distances
From: Bill Noyce
Date: 2003 Apr 7, 16:50 -0400
From: Bill Noyce
Date: 2003 Apr 7, 16:50 -0400
Jan Kalivoda wrote:
> Borda (1778):
> cos A squared = cos M cos S sec m sec s cos[(m+s+d)/2] cos[(m+s-d)/2]
> sin D/2 squared = sin[A + (M+S)/2] sin[A - (M+S)/2]
>
> I cannot understand, why this cumbersome method gained such popularity.
One advantage of this method, as George Huxtable has pointed out, is that
it can be performed using logarithms with no need to take antilogs. Does that
account for its popularity?
Thanks for the very informative survey.
-- Bill
